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MSH Protos, Mini Protos
› pitch not holding after 1 flight
02-04-2013 12:02 AM  5 years agoPost 1
Branmuffin

rrNovice

Portland,OR

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Not sure whats going on here. My protos has been flying great for a long time and recently starting to run into some small issues. The most frustrating is i cannot get the pitch to hold adjustment at all.

I am using a MSH brain and set the pitch in the software at +- 12 and after flying it has adjusted to +10 -14 or something similar to that and mid stick is usually about 2-3 degrees.

My shaft collar came slightly loose allowing some play in the mains haft so that was fixed but did not cure the problem. Main shaft is tight, spindle is tight and straight and setup seems to be proper. I am using mks ds9660 for cyclic and they seem to be working normal no issues.

If anyone has any suggestions it would be appreciated.
Thanks

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02-17-2013 05:23 PM  5 years agoPost 2
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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you could scuff the shaft a little bit underneath the collar and maybe use a very small amount of CA glue between the collar and shaft before you tighten the collar screw.....

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03-31-2013 05:41 PM  5 years agoPost 3
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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did you go through the software/heli setup again after fixing mechanical issue?

spending time, paying attention

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04-12-2013 07:31 AM  5 years agoPost 4
Roger Rocket

rrNovice

Morgan Hill,Ca-United States

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Does there also appear to be tracking problem, or are you saying both blades change pitch the same amount ?

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06-11-2015 04:06 PM  3 years agoPost 5
Sam2b

rrElite Veteran

Tacoma, WA

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What is meant by pitch not holding? Collective pitch? Cyclic pitch? Tail pitch? What is a tight main shaft? Your details are too ambiguous to understand your problem.

To note: If you have two or more grub screws on anything, there is a critical procedure to follow when tightening them.

_Sam B_

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